WARNING: POSSIBLE DNS SPOOFING DETECTED! 和 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 的解决方案

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当一个节点的ip发生变化，再进行ssh 就会提示以下错误：

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@       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @
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The ECDSA host key for hbase3 has changed,
and the key for the corresponding IP address 192.168.10.123
is unchanged. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
Offending key for IP in /home/hadoop/.ssh/known_hosts:38remove with:ssh-keygen -f "/home/hadoop/.ssh/known_hosts" -R 192.168.10.123
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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:q0DLHcBRoXyAXo3BlfjMSQ5khxS3LB2euNO3QSLJ8lQ.
Please contact your system administrator.
Add correct host key in /home/hadoop/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/hadoop/.ssh/known_hosts:22remove with:ssh-keygen -f "/home/hadoop/.ssh/known_hosts" -R hbase3
ECDSA host key for hbase3 has changed and you have requested strict checking.
Host key verification failed.

原来是known_hosts文件里面的问题， known_hosts是记录远程主机的公钥，我目前这个虚拟机是从其他虚拟机克隆过来的，里面保存的公钥信息是先前的公钥信息，在ssh链接的时候首先会验证公钥，如果公钥不对，就会出现报错信息。